Answer:
1. 314cm²
2. 216.16 sq ft
Step-by-step explanation:
there are six sides in each rectangular prism
to find the surface area, fins the area of each side and then add them together to find the total surface area!
1) 8cm x 9cm = 72cm²
x 2 (because there are two of the same sides) = 144cm²
5cm x 8cm = 40cm²
x 2 = 80cm²
144cm² + 80cm² = 224cm²
5cm x 9cm = 45cm²
x 2 = 90cm²
224 + 90 = 314cm² = total surface area
2) repeat the same process!
(12ft x 6.4ft) x 2 = 153.6sq ft
(6.4ft x 1.7ft) x 2 = 21.76 sq ft
(12ft x 1.7ft) x 2 = 40.8 sq ft
add these all together =
216.16 sq ft = total surface area
hope this helps :)
